WO2017010363A1 - Corps magnétique composite ignifuge - Google Patents

Corps magnétique composite ignifuge Download PDF

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WO2017010363A1
WO2017010363A1 PCT/JP2016/069975 JP2016069975W WO2017010363A1 WO 2017010363 A1 WO2017010363 A1 WO 2017010363A1 JP 2016069975 W JP2016069975 W JP 2016069975W WO 2017010363 A1 WO2017010363 A1 WO 2017010363A1
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magnetic body
composite magnetic
sheet
vol
flame retardant
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PCT/JP2016/069975
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English (en)
Japanese (ja)
Inventor
利行 五十嵐
浩幸 吉田
雅彦 藤
阿部　正和
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Ｎｅｃトーキン株式会社
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Priority to KR1020187003914A priority Critical patent/KR102398713B1/ko
Priority to US15/743,173 priority patent/US10829617B2/en
Priority to CN201680038317.1A priority patent/CN107710353B/zh
Publication of WO2017010363A1 publication Critical patent/WO2017010363A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/49—Phosphorus-containing compounds
    • C08K5/5399—Phosphorus bound to nitrogen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/54—Silicon-containing compounds
    • C08K5/544—Silicon-containing compounds containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
    • C08L101/06—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing oxygen atoms
    • C08L101/08—Carboxyl groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
    • C08L33/10—Homopolymers or copolymers of methacrylic acid esters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/20—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/22—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
    • H01F1/24—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated
    • H01F1/26—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated by macromolecular organic substances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/44—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
    • H01F1/442—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids the magnetic component being a metal or alloy, e.g. Fe
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/08—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
    • H01F10/10—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/32—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying conductive, insulating or magnetic material on a magnetic film, specially adapted for a thin magnetic film
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2217—Oxides; Hydroxides of metals of magnesium
    • C08K2003/2224—Magnesium hydroxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/016—Flame-proofing or flame-retarding additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0025—Crosslinking or vulcanising agents; including accelerators
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
    • C08L33/08—Homopolymers or copolymers of acrylic acid esters

Definitions

  • the present invention relates to a composite magnetic material useful as a magnetic sheet or the like that suppresses high-frequency noise generated from electronic equipment, and more particularly to a composite magnetic material imparted with flame retardancy by dispersing and mixing a metal soft magnetic powder in a resin.
  • CPUs and capacitors in electronic devices may cause abnormal heat generation, and electromagnetic wave absorbing materials are also required to have high flame retardance to prevent internal ignition.
  • the flame retardancy of resin materials is sometimes combined with a phosphorus component for char formation and a flame retardant aid that increases the flame retardancy by physical or chemical action. From the environmental aspect, the use of halogen-free and antimony-free flame retardants is being studied.
  • red phosphorus is generally used. However, since red phosphorus is granular, metal magnetic powder blended in the magnetic sheet, particularly flat magnetic powder, impairs the orientation, and affects magnetic permeability.
  • Patent Document 1 discloses a structure of an electromagnetic wave absorbing sheet that ensures flame retardancy without using granular red phosphorus or the like by an organic phosphorus compound, and absorbs moisture by using a polyfunctional epoxy resin as a crosslinking agent. Suppressed technology is disclosed.
  • Patent Document 2 is a noise suppression sheet mainly composed of ferromagnetic powder such as hexagonal ferrite, but as described in paragraphs 0050, 0051, and 0056, a configuration in which a metal soft magnetic powder or phosphazene is contained as a subcomponent is disclosed. It is disclosed.
  • Patent Document 1 The phosphate ester contained in Patent Document 1 is easy to absorb moisture, and there is a problem that the influence of moisture absorption cannot be sufficiently suppressed even if a cross-linking agent is devised.
  • Patent Document 2 there is a problem that the flame retardancy when a metal soft magnetic powder is a main component is not established.
  • an object of the present invention is to provide a composite magnetic body mainly composed of a metal soft magnetic powder, particularly a metal hard magnetic flat powder, and imparted with high flame retardancy without impairing performance such as magnetic permeability.
  • a composite magnetic body containing a metal soft magnetic flat powder in a volume content of 35% to 55% The composite magnetic body further includes a phosphazene compound, a binder resin, and a flame retardant aid not containing phosphorus so as to satisfy the following formulas (1) and (2): Provided. 0.17 ⁇ P / B ⁇ 0.21 (1) 0.89 ⁇ (PN + RA) /B ⁇ 2.71 (2) (Wherein PN is the mass% of the phosphazene compound in the composite magnetic body, RA is the mass% of the flame retardant aid in the composite magnetic body, B is the mass% of the binder resin in the composite magnetic body, and P is the composite magnetic body. The mass% of phosphorus in each is shown.)
  • high flame retardancy can be imparted to a composite magnetic body mainly composed of a metal soft magnetic powder without impairing performance such as magnetic permeability.
  • the composite magnetic body according to the present invention is a composite magnetic body containing a metal soft magnetic flat powder in a volume content of 35% or more and 55% or less, and further includes a phosphazene compound, a binder resin, and a flame retardant aid that does not contain phosphorus. Including.
  • Metal soft magnetic flat powder As the metal soft magnetic flat powder, sendust (Fe—Si—Al), electromagnetic soft iron (Fe), silicon steel (Fe—Si, Fe—Si—Cr), stainless steel (Fe—Cr), iron aluminum alloy (Fe—) Al, Fe—Al—Cr), permalloy (Fe—Ni), permendur (Fe—Co), Fe-based amorphous alloy, Co-based amorphous alloy, Fe-based nanocrystalline material, etc. Metal soft magnetic flat powder.
  • the metal soft magnetic flat powder is contained in a volume content of 35% to 55%. If the volume content is less than 35%, it is difficult to impart sufficient permeability. When the volume content exceeds 55%, the amount of the binder resin and the flame retardant component is insufficient, the metal soft magnetic flat powder falls off, and it becomes difficult to impart flame retardancy.
  • the metal soft magnetic flat powder is preferably contained in a volume content of 35% to 50%.
  • the phosphazene compound is a char-forming component containing a —P ⁇ N— bond and is not particularly limited as long as it is effective as a flame retardant.
  • a phosphazene compound substituted with a phenoxy group and a crosslinked product thereof are preferable.
  • polybisphenoxyphosphazene — [P (C 6 H 5 O) 2 N] n —
  • a cyclic bisphenoxyphosphazene compound represented by the general formula (A) or a chain bisphenoxyphosphazene compound represented by the general formula (B) is exemplified.
  • n represents an integer of 3 to 25, and Ph represents a phenyl group.
  • X 1 represents a group —N ⁇ P (OPh) 3 or a group —N ⁇ P (O) OPh
  • Y 1 represents a group —N ⁇ P (OPh) 4 or a group —N ⁇ P (O).
  • (OPh) represents 2
  • n represents an integer of 3 to 1000
  • Ph represents a phenyl group.
  • the compound of the general formula (A) and / or (B) is selected from the group consisting of an o-phenylene group, an m-phenylene group, a p-phenylene group, and a bisphenylene group represented by the general formula (C).
  • a crosslinked phenoxyphosphazene compound crosslinked with at least one selected crosslinking group can also be used as a suitable compound.
  • A represents —C (CH 3 ) 2 —, —SO 2 —, —S— or —O—, and z represents 0 or 1).
  • the cyclic bisphenoxyphosphazene compound (A) and / or the chain bisphenoxyphosphazene compound (B) is used, and the phenylene-based crosslinking group is a phenyl group of the bisphenoxyphosphazene compound.
  • the content of the phenylene group in the bridged phenoxyphosphazene compound interposed between two desorbed oxygen atoms is 50 to 50 based on the total number of phenyl groups (A) and / or (B) in the compound.
  • a phenylene-based crosslinked phenoxyphosphazene compound having at least one phenolic hydroxyl group within a range of 99.9% is more preferable.
  • Polybisphenoxyphosphazene has a structure in which a phosphorus atom is surrounded by a hydrophobic benzene ring, so it has a hygroscopicity of about 1/10 compared to a char component such as a phosphate ester, and magnetic properties such as a magnetic sheet.
  • a char component such as a phosphate ester
  • magnetic properties such as a magnetic sheet.
  • polybisphenoxyphosphazene has excellent solubility in organic solvents such as toluene and does not cause filling inhibition or orientation inhibition of metal soft magnetic flat powder as compared with red phosphorus as a char component. The internal permeability can be maintained.
  • polybisphenoxyphosphazene is an oligomer or a polymer, it can constitute a magnetic sheet as an organic binder together with a binder resin. Therefore, there is no occurrence of flat powder falling of the magnetic sheet due to the lack of the binder due to the addition of the flame retardant. Further, it is possible to provide a magnetic sheet that is excellent in pressure moldability and has a high magnetic permeability even in a short time.
  • Binder resin any resin component can be used as long as it can be molded into a sheet shape by adding metal soft magnetic flat powder, but it is particularly flexible and highly filled with metal soft magnetic flat powder, rubber and elastomer components Is preferred.
  • acrylic rubber (meth) acrylic polymers such as alkyl acrylate copolymers, acrylonitrile-butadiene rubber (NBR), silicone rubber, polyurethane, polyethylene, ethylene / propylene rubber (EPM), ethylene / propylene / diene rubber (EPDM) Olefin-based rubber and the like.
  • a thermoplastic resin such as polyphenylene oxide (PPO) having high flame retardancy can be used in combination. These also function as part of the flame retardant aid.
  • PPO polyphenylene oxide
  • the phosphazene compound and the binder resin are preferably dissolved in an appropriate solvent in advance to form an organic binder.
  • an organic binder using a solvent that dissolves both, the phosphazene compound is uniformly distributed in the organic binder, and the uniformity of flame retardancy is further improved.
  • the solvent is not particularly limited, and examples thereof include acetone, methyl ethyl ketone, dimethylformamide, cyclohexanone, and toluene, which are highly soluble in phosphazene compounds.
  • the flame retardant aid that does not contain phosphorus is not particularly limited as long as it can impart flame retardancy together with the phosphazene compound as the char-forming material by endothermic action and oxygen blocking action, and does not contain inorganic and organic phosphorus. Examples include flame retardant aids. Moreover, the thing which does not contain a halogen atom from a halogen-free viewpoint is preferable.
  • inorganic flame retardants and flame retardant aids include metal hydroxides such as aluminum hydroxide and magnesium hydroxide, metal oxides such as zinc oxide, and expandable graphite.
  • organic flame retardant and the flame retardant aid include nitrogen-containing cyclic compounds, and among them, melamine cyanurate can be preferably used. Melamine cyanurate has effects of endothermic action and oxygen blocking action (oxygen concentration dilution action).
  • An organic binder containing a phosphazene compound and a binder resin and a flame retardant aid need to satisfy the following formulas (1) and (2). 0.17 ⁇ P / B ⁇ 0.21 (1) 0.89 ⁇ (PN + RA) /B ⁇ 2.71 (2) (Wherein PN is the mass% of the phosphazene compound in the composite magnetic body, RA is the mass% of the flame retardant aid in the composite magnetic body, B is the mass% of the binder resin in the composite magnetic body, and P is the composite magnetic body. The mass% of phosphorus in each is shown.)
  • Silane compound The magnetic composite according to the present invention preferably contains a silane compound in addition to the above components.
  • Silane compounds include amine-based silane coupling agents such as titanate-based silane coupling agents and aluminate-based silane coupling agents, and amine-based materials that crosslink resin components such as 3-aminopropylethoxysilane to improve high-temperature, high-humidity environmental resistance. A crosslinking agent etc. are mentioned.
  • the magnetic composite according to the present invention can be formed into a sheet to form a magnetic sheet.
  • the magnetic sheet can be used as an internal circuit of an electronic device such as a personal computer, a noise suppression sheet disposed in a housing of a mobile phone, a smart phone or the like, an electromagnetic wave shield, a magnetic shield, or a magnetic yoke of an RFID antenna.
  • an electronic device such as a personal computer, a noise suppression sheet disposed in a housing of a mobile phone, a smart phone or the like, an electromagnetic wave shield, a magnetic shield, or a magnetic yoke of an RFID antenna.
  • use as a thin magnetic sheet is suitable.
  • the magnetic material sheet can be produced by hot pressing the magnetic composite according to the present invention.
  • Example 1 Alkyl acrylate copolymer dissolved in toluene was used as a binder for solid content of alkyl acrylate copolymer 17.91 (vol.%) And polybisphenoxyphosphazene 23.46 (vol.%).
  • Example 2 Alkyl acrylate copolymer dissolved in toluene was used as a binder for solid content of alkyl acrylate copolymer 18.00 (vol.%) And polybisphenoxyphosphazene 19.38 (vol.%).
  • Example 3 The alkyl acrylate copolymer dissolved in toluene was used as a binder for the solid content of alkyl acrylate copolymer 19.24 (vol.%) And polybisphenoxyphosphazene 20.72 (vol.%).
  • Sendust flat powder 42.72 as a metal soft magnetic flat powder. (Vol.%) was mixed and formed into a film having a thickness of 100 ( ⁇ m) with a doctor blade.
  • FIGS. 1 1 is a sendust flat powder
  • 2 is red phosphorus coated with Al (OH) 3
  • 3 to 5 are organic binders containing a flame retardant aid for each sheet.
  • the red phosphorus 2 having a large particle size causes filling inhibition and orientation inhibition of the Sendust flat powder 1, and the magnetic permeability is lowered.
  • the Sendust flat powder 1 is oriented in the sheet surface, and the voids are also reduced.
  • each flame retardant component granular material
  • each D90 represents 6 aluminum hydroxide coatings with respect to the thickness (about 1 ⁇ m) of the magnetic flat powder (Sendust).
  • the particulate matter such as the flame retardant component preferably has a particle size distribution D 90 of 5 times or less of the thickness of the metal soft magnetic flat powder, more preferably 2 times or less. .
  • AACP alkyl acrylate copolymer
  • PBPN polybisphenoxyphosphazene
  • MO magnesium hydroxide
  • MC melamine cyanurate
  • SEN 3-aminopropylethoxysilane

Abstract

L'invention concerne un corps magnétique composite qui contient une poudre de particules métalliques plates faiblement magnétiques en une quantité de 35 à 55 % en volume, le corps magnétique composite étant caractérisé en ce qu'il contient en outre un composé phosphazène, un liant résineux et un ignifugeant auxiliaire sans phosphore en des quantités telles que la formule (1) et la formule (2) sont satisfaites. Le corps magnétique composite peut conférer une haute ininflammabilité sans perte de performances telles que la perméabilité magnétique. 0,17 ≤ P/B ≤ 0,21 (1) 0,89 ≤ (PN + RA)/B ≤ 2,71 (2) (dans les formules, PN représente le pourcentage en masse du composé phosphazène dans le corps magnétique composite, RA représente le pourcentage en masse de l'ignifugeant auxiliaire dans le corps magnétique composite, B représente le pourcentage en masse du liant résineux dans le corps magnétique composite, et P représente le pourcentage en masse de phosphore dans le corps magnétique composite.)
PCT/JP2016/069975 2015-07-10 2016-07-06 Corps magnétique composite ignifuge WO2017010363A1 (fr)

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Application Number Priority Date Filing Date Title
KR1020187003914A KR102398713B1 (ko) 2015-07-10 2016-07-06 난연성 복합 자성체
US15/743,173 US10829617B2 (en) 2015-07-10 2016-07-06 Flame-retardant composite magnetic body
CN201680038317.1A CN107710353B (zh) 2015-07-10 2016-07-06 阻燃性复合磁性体

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JP2015138674A JP6441756B2 (ja) 2015-07-10 2015-07-10 難燃性複合磁性体
JP2015-138674 2015-07-10

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JP (1) JP6441756B2 (fr)
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CN (1) CN107710353B (fr)
TW (1) TWI579351B (fr)
WO (1) WO2017010363A1 (fr)

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JP2017022262A (ja) 2017-01-26
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